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README.md

VpnCloud - Peer-to-Peer VPN

Build Status Coverage Status Latest Version

VpnCloud is a simple VPN over UDP. It creates a virtual network interface on the host and forwards all received data via UDP to the destination. VpnCloud establishes a fully-meshed VPN network in a peer-to-peer manner. It can work on TUN devices (IP based) and TAP devices (Ethernet based). Tunneling traffic between two nodes can be as easy as:

vpncloud -c REMOTE_HOST:PORT --ifup 'ifconfig $IFNAME 10.0.0.1/24 mtu 1400 up'

For more information, please see the Wiki.

Project Status

This project is still under development but has reached a somewhat stable state. VpnCloud features the following functionality:

  • Setting up tunnels between two networks via Ethernet (TAP) and IP (TUN)
  • Connecting multiple networks with multiple forwarding behaviors (Hub, Switch, Router)
  • Encrypted connections using libsodium
  • Automatic peer-to-peer meshing, no central servers
  • NAT and (limited) firewall traversal using hole punching
  • Automatic reconnecting when connections are lost
  • Non-native forwarding modes, e.g. IP based learning switch and prefix routed Ethernet networks.
  • High throughput and low additional latency (see performance page)
  • Support for tunneled VLans (TAP device)

Contributions welcome

There are several areas in which still some work has to be done and where contributions are very welcome:

  • Linux packages: VpnCloud is stable enough to be packaged for Linux distributions.
  • Security review: The security has been implemented with strong security primitives but it would great if a cryptography expert could verify the system.
  • Feedback on use cases: Some feedback on how VpnCloud is being used and maybe some tutorials covering common use cases would be nice.

Semantic Versioning

This project uses semantic versioning. Currently that means that everything can change between versions before 1.0 is finally released. However I am considering to release 1.0 soon.